Improved perforations in lamp-burners



W- H- SMITH.

Perforation in Lamp Burners.

" Patented March 3, 1863.

77227: 66.566 y /Mf UNITED STATES PATENT OFFICE.

WILLARD H. SMITH, OF NEW YORK, N. Y.

IMPROVED PERFORATIONS IN LAMP-BURNERS.

Specification forming part of Letters Patent No. 37,845, dated March 3, 1863.

To (1% whom, it may concern.-

Be it known that I, WILLARD H. SMITH, of New York city, in the county and State of New York, have invented a new Improvement in the perforations of lamp-burners (forburning coal-oils and other substances) for admitting air to the chimney and preventing the communication of heat between the chimney and the cone 5 and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, in which- Figure 1 is an external view of an ordinary coal-oil lamp-burner with a glass chimney attached and my perforations made in the horizontal or bottom portion of the cone. Fig. 2 is a detached view of the cone, so that the perforations may be seen to better advantage. Fig. 3 is an enlarged view of the perforations.

Similar letters of reference indicate corresponding parts in the several figures.

This invention relates to an improvementin the perforations of lamp-burners for burning coal-oils and other substances.

The object of the invention is to admit a current of air to the interior of the chimney, and at the same time prevent the communication ofheat between the chimney and the cone. This object is attained by causing raised or punched perforations to be made in the horizontal or bottom portion of the cone, through which the cold air passes into the interior of the chimney, and the chimney being detached from the cone by resting on the rims which surround the perforations prevents the communication of heat between the chimney and the cone, thereby keeping the cone and the chimney cool.

To enable those skilled in the art to fully understand and construct my invention, I will proceed to describe it.

A represents a lamp-burner of the ordinary form for burning coal and other oils. B is the cone, which is of the same construction as those in common use. In the horizontal or bottom part of this cone, instead of smooth out perforationsbein g made they are punched or made so that an edge is raised all round them, as shown at 0 in Figs. 2 and 3.

By this device the air is drawn into the in terior of the chimney with greater velocity, and made to impinge upon the flame with a greater degree of intensity, thereby keeping the chimney cool and increasing the intensity of the light, and the chimney resting upon the edges of the perforations it is thereby detached from the cone and the communication of heat between the chimney and the cone is thus prevented, for the hot air as it accumulates readily passes out under the chimney.

Having thus described the construction and operation of my invention, Iwould observe in closing that I do not claim a smooth-cut perforation; but

What I consider as new, and desire to se cure by Letters Patent of the United States,

A raised perforation, as shown at 0 in Figs. 2 and 3, when used in coal-oil and other burners, the whole being arranged substantially as and for the herein-described purposes.

WILLARD H. SMITH.

Witnesses:

HENRY W. JOHNSON, S. A. HOLT, GEORGE MOLINEUX. 

